07-16-2015, 11:47 AM | #1 |
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Flow testing
What size container (in CC) is use to measure the amount of flow when testing zenith jets and where can it be bought? Thanks...
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07-16-2015, 01:11 PM | #2 |
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Re: Flow testing
Hello JD 1931,
I purchased mine from a medical supply outlet and it measures to 250ML they can also be found at a photography supplier.
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07-16-2015, 04:27 PM | #3 |
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Re: Flow testing
Thanks for the info, ordered one on Amazon.....
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07-16-2015, 06:16 PM | #4 |
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Re: Flow testing
If you have a scale that measures in grams you can use any old container for your timed catch. Just tare it out. 1g H2O = 1cc = 1ml. This will be more accurate than trying to read the meniscus on some graduated containers.
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07-16-2015, 06:41 PM | #5 |
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Re: Flow testing
what to use to hold the jets in place? clear tubing?
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07-16-2015, 08:11 PM | #6 | |
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Re: Flow testing
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Quote:
Flow test values (jets): Main – 140-150 cc per min. Cap – 150 – 180 cc per min. Comp – 138 – 142 cc per min Idle – 38 – 42 cc per min
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07-16-2015, 10:31 PM | #7 |
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Re: Flow testing
I built mine from PVC tubing with a submersible pump. I used plastic tubing to attach the jets.
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1931 160B & 1931 68B If you don't have time to do it right the 1st time, how do you have time to do it the 2nd time? |
07-16-2015, 10:43 PM | #8 |
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Re: Flow testing
Looks like I will be rube goldberging an appratus. Don't want to be accused of tinkering. Thanks for the pictures and explainations.
Now if I can just keep the fuel clean. Bob |
07-16-2015, 10:59 PM | #9 | |
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Re: Flow testing
Quote:
Thanks TC
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07-17-2015, 03:24 AM | #10 |
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Re: Flow testing
Ford Garage has wealth of info on the B carb including flow rates.
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07-17-2015, 04:45 AM | #11 |
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Re: Flow testing
[QUOTE=Wagga A'er;1122410]Ford Garage has wealth of info on the B carb including flow rates.
Thank you Wagga A'er. I have seen the information on the Ford Garage site, however it seems that some use a head pressure of 36" others use 37 1/4" while others do not state a head pressure. There has been information here on the Barn where new flow rates have been developed to give the best power and economy and are more suited to the modern fuels. Very rarely is the head pressure given for the new flow rates. I am running a standard 32 to 34 engine, with counter balanced crank. (C on the Head) and I'm striving to get the best of both worlds. (power and economy}
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07-17-2015, 06:34 AM | #12 |
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Re: Flow testing
I assume that is using water and with a head of 40". Is that so??
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07-17-2015, 10:06 AM | #13 |
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Re: Flow testing
1. Tom Endy's web site,specifies the following flow rates using a 36 inch column of water.
http://www.ocmafc.com/techarticles/T...%2011-2007.pdf Flow test values (jets): Main – 140-150 cc per min. Cap – 150 – 180 cc per min. Comp – 138 – 142 cc per min Idle – 38 – 42 cc per min2. Steve Pargeter's Zenith Model A Carburetor Restoration Guidelines version 3 specifies the following flow rates with a 36 inch column of water. Flow test values (jets): Main – 150-160 cc per min. Cap – 150 – 185 cc per min. Comp – 138 – 142 cc per min Idle – 44 – 48 cc per min3. Gordon Biggar's Restoring the Model "A" & "B" Carburetors the "Rex" Reheis way specifies the following flow rates for the A carburetor Carburetor Flow test values (jets): at 36 inch column of water Model A Main – 140 - 150 cc per min. Cap – 150 – 185 cc per min. Comp – 138 – 142 cc per min Idle – 44 – 48 cc per min4. Gordon Biggar's Restoring the Model "A" & "B" Carburetors the "Rex" Reheis way specifies the following flow rates for the B carburetor Carburetor Flow test values (jets): at 36 inch column of water Model B Main – 136 - 142c c per min. Cap – 372 – 462 cc per min. Comp – 110 - 118 cc per min Idle – 43 – 47 cc per minPower 110 - 118 cc per min Carburetor Flow test values (jets): at 37.25 inch column of water Model B Main – 138 - 144 cc per min. Cap – 378 - 470 - 185 cc per min. Comp – 112 – 120 cc per min Idle – 44 – 48 cc per minPower 112 - 120 cc per min TC, I hope this helps. There are a lot of different flow rates recommended, In Gordon Biggars book they state the ranges were developed by Steve Pargeter, so you may assume that that the main jet flow data in paragraph 3 above (140 - 150) is a typo and should be 150 - 160??
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1931 160B & 1931 68B If you don't have time to do it right the 1st time, how do you have time to do it the 2nd time? Last edited by 160B; 07-17-2015 at 10:24 AM. |
07-17-2015, 11:34 AM | #14 |
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Re: Flow testing
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07-17-2015, 07:52 PM | #15 |
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Re: Flow testing
Thank you 160B
Regards from down under T&C
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07-18-2015, 01:59 PM | #16 |
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Re: Flow testing
Wonder what Renners Corner uses? and/or Berg's? Guess I will call.
Appreciate 160B documenting his sources. Bob |
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